[....] Starting enhanced syslogd: rsyslogd[   12.344724] audit: type=1400 audit(1516392986.913:4): avc:  denied  { syslog } for  pid=3175 comm="rsyslogd" capability=34  scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1
[?25l[?1c7[ ok 8[?25h[?0c.
Starting mcstransd: 
[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

Warning: Permanently added '10.128.0.16' (ECDSA) to the list of known hosts.
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syzkaller login: [   37.940205] kasan: CONFIG_KASAN_INLINE enabled
[   37.941525] kasan: CONFIG_KASAN_INLINE enabled
[   37.941527] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   37.941534] general protection fault: 0000 [#1] PREEMPT SMP KASAN
[   37.941538] Dumping ftrace buffer:
[   37.941540]    (ftrace buffer empty)
[   37.941543] Modules linked in:
[   37.941547] CPU: 0 PID: 3361 Comm: syzkaller088823 Not tainted 4.9.77-g9c3804b #17
[   37.941549] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   37.941552] task: ffff8801c990b000 task.stack: ffff8801c8ad0000
[   37.941564] RIP: 0010:[<ffffffff8144ed01>]  [<ffffffff8144ed01>] __free_pages+0x21/0x80
[   37.941566] RSP: 0018:ffff8801c8ad79b0  EFLAGS: 00010a07
[   37.941569] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff8266751b
[   37.941571] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
[   37.941573] RBP: ffff8801c8ad79c0 R08: 0000000000000001 R09: 0000000000000001
[   37.941575] R10: 0000000000000000 R11: ffff8801c990b000 R12: 0000000000000004
[   37.941577] R13: 0000000000000020 R14: ffff8801c9192100 R15: dffffc0000000000
[   37.941581] FS:  00007f71ad924700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
[   37.941583] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   37.941585] CR2: 000000002026b000 CR3: 00000001c7d40000 CR4: 0000000000160670
[   37.941589] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   37.941591] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   37.941592] Stack:
[   37.941598]  0000000000000001 ffff8801c9192258 ffff8801c8ad7a20 ffffffff82667541
[   37.941602]  ffff8801c9192270 ffffed003923244b ffffed003923244e ffff8801c9192268
[   37.941607]  dead4ead00000000 ffff8801c9192240 0000000000000000 0000000000000000
[   37.941608] Call Trace:
[   37.941615]  [<ffffffff82667541>] sg_remove_scat.isra.19+0x1c1/0x2d0
[   37.941619]  [<ffffffff82667905>] sg_finish_rem_req+0x2b5/0x340
[   37.941623]  [<ffffffff82667ce6>] sg_new_read.isra.20+0x356/0x3e0
[   37.941626]  [<ffffffff82665c08>] ? sg_get_rq_mark+0x88/0x190
[   37.941629]  [<ffffffff826695bd>] sg_read+0x8bd/0x1440
[   37.941633]  [<ffffffff82668d00>] ? sg_proc_seq_show_debug+0xd10/0xd10
[   37.941637]  [<ffffffff81643de0>] ? fsnotify+0xf30/0xf30
[   37.941643]  [<ffffffff81bdb879>] ? avc_policy_seqno+0x9/0x20
[   37.941649]  [<ffffffff8156c5c1>] do_loop_readv_writev.part.17+0x141/0x1e0
[   37.941653]  [<ffffffff81bd2939>] ? security_file_permission+0x89/0x1e0
[   37.941657]  [<ffffffff82668d00>] ? sg_proc_seq_show_debug+0xd10/0xd10
[   37.941660]  [<ffffffff82668d00>] ? sg_proc_seq_show_debug+0xd10/0xd10
[   37.941664]  [<ffffffff81570430>] do_readv_writev+0x520/0x750
[   37.941668]  [<ffffffff8156ff10>] ? vfs_write+0x530/0x530
[   37.941672]  [<ffffffff815d0d21>] ? __fget+0x201/0x3a0
[   37.941676]  [<ffffffff815d0d48>] ? __fget+0x228/0x3a0
[   37.941679]  [<ffffffff815d0b67>] ? __fget+0x47/0x3a0
[   37.941682]  [<ffffffff815706e4>] vfs_readv+0x84/0xc0
[   37.941686]  [<ffffffff81570806>] do_readv+0xe6/0x250
[   37.941689]  [<ffffffff81570720>] ? vfs_readv+0xc0/0xc0
[   37.941695]  [<ffffffff838b2c0a>] ? entry_SYSCALL_64_fastpath+0x5/0xe8
[   37.941702]  [<ffffffff8123b56b>] ? trace_hardirqs_on_caller+0x38b/0x590
[   37.941705]  [<ffffffff81573cf7>] SyS_readv+0x27/0x30
[   37.941709]  [<ffffffff838b2c2e>] entry_SYSCALL_64_fastpath+0x29/0xe8
[   37.941763] Code: e9 27 fc ff ff 0f 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 48 89 fb 48 83 c7 1c 48 89 fa 48 83 ec 08 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 3d 
[   37.941769] RIP  [<ffffffff8144ed01>] __free_pages+0x21/0x80
[   37.941770]  RSP <ffff8801c8ad79b0>
[   37.941777] ---[ end trace 9612816d8a71fa3d ]---
[   37.941780] Kernel panic - not syncing: Fatal exception
[   37.945185] Dumping ftrace buffer:
[   37.945188]    (ftrace buffer empty)
[   37.945189] Kernel Offset: disabled
[   38.300842] Rebooting in 86400 seconds..